Condition-Based Spare Ordering Model for a Two-Stage Degrading System  

作　　者：Cheng Wang Jianxin Xu Zhenming Zhang Hongjun Wang 

机构地区：[1]School of Mechanical Engineering,Xi'an Aeronautical University,Xi'an 710077,China [2]School of Mechanical Engineering,Northwestern Polytechnical University,Xi'an 710072,China [3]Key Laboratory of Modern Measurement and Control Technology,Ministry of Education,Beijing Information Science and Technology University,Beijing 100192,China

出　　处：《Journal of Systems Science and Systems Engineering》2020年第1期85-99,共15页系统科学与系统工程学报（英文版）

基　　金：The authors are grateful to the anonymous reviewers and the editor for their critical as well as constructive review of the manuscript.This research is supported by the National Natural Science Foundation of China under Grant Nos.51575055 and 51975058 and the National Science and Technology Major Project of China under Grant No.2015ZX04001002.

摘　　要：Proper supply of spares is critical to guarantee safe operation,improve service quality and reduce maintenance costs.This paper proposes a condition-based spare ordering model for a two-stage degrading system,which consists of inflection point transfer process and two-stage degradation process with continuous degradation process and random external shocks.External shocks itself does not directly lead to system failure,but it will speed up the degradation process.In turn,degradation can also make the system more vulnerable to shocks.In general,the degradation rate at the defective stage is greater than that at the normal stage.The proposed model depends on system degradation process and spare lead-time.In order to achieve accurate maintenance and deal with emergency maintenance caused by system rapid degradation after inflection point transfer time,the model considers both the regular lead-time and expedited lead-time.Before inflection point transfer time,regular spare ordering policy is performed.After inflection point transfer time,expedited spare ordering policy is implemented.The decision variable of the model is the ordering time.The objective of this study is to determine the optimal ordering time such that the expected cost rate is minimized.Finally,a numerical example is presented to illustrate the proposed model and sensitivity analysis on critical parameters is carried out.

关 键 词：Condition-based spare ORDERING INFLECTION point TWO-STAGE degradation RANDOM external SHOCKS RANDOM LEAD-TIME 

分 类 号：V267[航空宇航科学与技术—航空宇航制造工程]